Fluid pump

ABSTRACT

The present invention provides a fluid pump having upper and lower trains of plural rotors having two blades and recesses with their phase angles shifted with respect to each other.

United States Patent Inventor -Kenryu Takahmhi 3-30, ZZ-ban, l-chome, Higashitateishi, Kalsushika, Tokyo, Japa Appl. No. 856,288 7 Filed Sept. 9, 1969 Patented Aug. 31, 1971 Priority June 16, 1969 Japan 44/46848 'FLUID PUMP 1 Claim, 3 Drawing Figs.

11.8. C1 418/ 199, 418/206 Int. Cl. FOlc 11/00 Field of Search 418/10,

References Cited 9 UNITED STATES PATENTS 693,609 2/1902 Kirkwood 418/199 1,035,385 8/1912 Pearsall 418/200 1,723,493 8/1929 'Schotthoefer 418/200 Primary Examiner-Carlton R. Croyle Assistant ExaminerWi1bur J. Goodlin Attorney-Steinberg & Blake ABSTRACT: The present invention provides a fluid pump having upper and lower trains of plural rotors having two blades and recesses with their phase angles shifted with respect to each other.

FLUID PUMP BACKGROUND OF THE INVENTION -A fluid pump of the present invention belongs to the type of rotary pump which may be classified into (a) three-lobe pump (b) two-screw pump external gear pump (d) sliding vane pump, but a special type of having upper and lower trains of plural rotors having two blades and recesses with their phase angles shifted each other, so that it transfers continuously and uniformly a greater amount of fluid with higher pressure and sucking head, without no priming fluid and cavitation, and under least vibration and noises.

SUMMARY OF THE INVENTION The present invention provides a fluid pump comprising trains of upper and lower couples of rotors; the rotor having two blades and recesses at right angles; the blade fitting into the recess; each rotor phase angle shifting; and the rotors counterrotating to transfer a greater amount of fluid with higher pressure and sucking head under no cavitation.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a cross section perpendicular to an axe of one preferred embodiment of the present invention.

FIG. 2 is an axial cross section of FIG. 1.

FIG. 3 is a squint view of a train of rotors.

DESCRIPTION OF THE PREFERRED EMBODIMENT The fluid pump of the present invention will be described in more detail in connection with the preferred embodiment.

FIG. 1 shows a fluid pump having anB-shape chamber 1 comprising three unit-casings 10, lb, 1c connected tightly by I bolts 2, 2. 7

Cover plates 3, 3a cover the right and left opening sides of the chamber 1 by the bolts 2, 2 tightened.

Fluid storing rooms 4, 5 are mounted on bloc before and behind the chamber 1.

Connecting holes 6, 7 formed in the center of the chamber 1 make the insides of the fluid storing rooms 4, 5 to communicate with the inside of the chamber 1. 1

An inlet 8 and an outlet 9 are projected from the outsides of the fluid storing rooms 4,5.

A main, driving shaft 10 and a subject driven shaft 11 are horizontally bridged over in the chamber l.

Each train of three couples of rotors 12, 12a, 12b and 13a, 13b is mounted on the shafts 10, 1 1.

Partition walls 14, 14a, 14b projected inside the unit-casings la, 1b, 10 contact slidingly with each peripheral surface of the joint parts ofthe rotors 12, 12a, 12b and 13, 13a, 13b.

Two mutually opposed projecting blades 15, 15a and two opposed recesses 16, 16a are mounted on the peripheral surfaces of the rotors 12, 12a, 12b and 13, 13a, 13b at right angles.

The blades 15, 15:: contact slidingly with the inside circular wall of the chamber 1. The recesses 16, 16a are concaved to fit the blades 15, 15a.

The-rotors 12, 12a, 12b and 13, 13a, 13b are combined to fix with their phase angles shifting at 60.

Gears 17, 18 are mounted on the shafts 10, 11 to mesh each other.

' A containing room 19 of the choking plate 30 contains the gears 17, 18. Y

Accordingly when driving the main shaft 10 in connection with the prime mover, the subjectshaft 11 will cooperate to drive forcibly the rotors 12, 12a, 12b and 13, 13a, 13b to revolve so that the blades 15, 15a of each upper or lower rotor exit 9 through the fluid storing room 5. I

he experimental results are shown in the following tables in case of testing ability of hydraulic power of the present fluid pump.

Rrztation velocity of pump hp. 1, 375 1, 360 1, 340 1, 290 I 1, 240 Fluid volume of pumped storage (m. /1nin.) 0.157 0.156 0.153 0.149 Vommiting head (m.)- 8.0 10.0 15.0 19. 0 Sucking head (In.) Y 8. 2 8. 2 7. 75 8. 84 Total head (m.) 14. 9 16. 2 18. 2 22. 7 27. 8 Hydraulic power (kw.) 3. 84 4. 15 4. 16 5. 80 7. Voltage (v.) 200 200 197 197 193 Electric current (a.) 8.4 9.0 8. 8 13.0 13.0 Power factor 0. 875 9.0 8. 8 13. 0 13.0 Efficiency, percent 0.757 9, 0 8. 8 13. 0 13. 0 Shaft power of pump (kw 1. 88 2.00 1. 97 2. 64 2. 5-! Pump efliciency, percent 49 48 42 46 Open all Close all TABLE 2.READING DATA IN TESTING Experiment N 0-: 1 2 3 4 Voltage (v.) 200 200 197 193 Ampere (a.) 8. 4 9. 0 13 13 Rotation velocity 1,375 1, 360 1, 290 1, 240 Vommiting volume (l./min.)- 166 167 167 166 Vommiting pressure (drg.) 0. 65 0.7 1. 5 1. 9

Thepump, with its two joining piles of plural couples of rotors each mounting the two blades and the two recesses to shifteach phase angle, transfers continuously and uniformly a greateramount of fluid with higher vomiting and sucking head, and without no priming fluid, under least vibration and noises. v v r The pump of the present invention may not decrease its functional efficiency'ifallowance between' the blades or the rotors and the chamber is larger, as well as it may avoid per-. fectly cavitation phenomena which is caused when increasing rotation velocity because of each fluid storing room before and behind the chamber.

The suctorial inletand the vomitory outlet may be mounted plurally according to usage of the pump.

The pump of the present invention may be produced smaller in its shape with greater efficiency and strength.

What I claim is:

1. A fluid pump having an 8-shape'chamber comprising unit-casings to be combined and containing a main shaft and a subject shaft horizontally bridgedv over in the said chamber, the said both shafts having upper and lower trains of couples of rotors jointly contained each in the corresponding said unitcasing, the said rotors each having two mutually opposed projecting blades and two opposed recesses, each blade of one rotor fitting into the said recess of the other rotor, the said rotors beirjig combined to shift their phase angles with respect to each other, the peripheral joint area of the said rotors contractingwith partition walls mounted inside the said chamber slidingly, said partition walls being situated within said chamber at those locations where the phase angles shift, the said chamber having fluid storing rooms before and behind itself,and the said fluid storing rooms each projecting and having a volume larger than a suctorial, inlet and pressure outlet. 

1. A fluid pump having an 8-shape chamber comprising unitcasings to be combined and containing a main shaft and a subject shaft horizontally bridged over in the said chamber, the said both shafts having upper and lower trains of couples of rotors jointly contained each in the corresponding said unit-casing, the said rotors each having two mutually opposed projecting blades and two opposed recesses, each blade of one rotor fitting into the said recess of the other rotor, the said rotors being combined to shift their phase angles with respect to each other, the peripheral joint area of the said rotors contracting with partition walls mounted inside the said chamber slidingly, said partition walls being situated within said chamber at those locations where the phase angles shift, the said chamber having fluid storing rooms before and behind itself, and the said fluid storing rooms each projecting and having a volume larger than a suctorial inlet and pressure outlet. 